ECMA-334: 12.3.3.28 Yield statements

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12.3.3.28 Yield statements

For a yield return statement stmt of the form:

yield return expr ;

• A variable v has the same definite assignment state at the beginning of expr as at the beginning of stmt.

• If a variable v is definitely assigned at the end of expr, it is definitely assigned at the end point of stmt; otherwise, it is not definitely assigned at the end point of stmt.